Carbureting device for heavy fuels.



A. C. STEWART. GARBURETING DEVICEv POR HEAVY FUELS.

APPLICATION FILED FEB. 27, 1911.

Patented Feb. 13,1912.

1 e ./0 7 7 ,L 4 4 .Q b fu m w a J m n Nwe:

UNTTED sTATEs PATENT oEEioE.

ALFRED C. STEWART, 0E Los AivGELEs, CALIFORNIA.

CARBURETING- DEVICE FOR vHEAVY FUELS.

speeineation of Letters Patentv Patented Feb. 13,1912.

Application led February 27, 1911. Serial No. 611,287.

To all 'whom t may concern Be it' known that I, ALFRED C.

of the 'distillate when supplied through an` ordinary carbureter is not delivered to the engine in vaporized and mixed condition, but tends to condense and deposit in the passages between the carbureter and the cylinders of the engine.

The present invention provides for yaporization of such condensed or condensable' portions of the fuel and delivery thereof to the cylinders of the engine as apart of the mixture.

Other objects of the invention appearv hereinafter.

The accompanyin vdrawings illustrate the invention, and re erring thereto: Figure 1 is an elevation of the device with parts in section. Fig. 2 is a section on line :r2-m2 in Fig. 1. Fig. 3 is a vertical section showing another form of the device.

Referring to Fig. 1, an en lne cylinder is indicated at 1,--provided with induction pipe or inlet manifold 2, and with education or exhaust pipe 3. A carbureter 4 of any usual or suitable construction' is provided with air inlet 5, oil inlet 6 and outlet 7 said outlet communicating with a chamber or passage 8, formed as a lateral extension from the upper end of a tubular casing or chamber 9. The passage 8 preferably enters said casing 9 in a tangential direction. A tube or pipe 10 extends downwardly within said tubular casing 9 and may be provided with a throttle valve 11 for controlling the supply to the engine, said tube or pipe 10 beingconnected to the inlet manifold 2 by a tubular connection 12. A pipe or tubular connection 13 leads from the bottom of the tubular casing or chamber 9 to a part of the inletpipe or manifold 2, adjacent to the inlet ports of the `en 'ne and at some portion in its length this pipe or tubular connection STEWART, a citizen ofthe United States, residing at nection 13.

13 is provided with `a portion 14 extending within heating means, for example, the exhaust pipe 3-forl the engine.

The operation of the device is as follows: The engine being in operation and the throttle 11 being open, air is drawn through the carbureter at each stroke of the engine and a certain amount -of liquid fuel is drawn with the air throughthe carburete'r. The

invention is particularly intended for cases where the liquid fuel is of such heavy nature that it-cannot be thoroughly vaporized and. mixed in the'carbureter, and the carbureter -4 therefore serves primarily as a measuring or feeding device for supplying to the air a definite amount of liquid fuel in accordance with the demands of the engine.' The air and imperfectly mixed oil pass through the passage 8 into the tubular casing or chamber 9, preferably in a tangential direction. and the effect of .the rotary or vortical movement vthereby set up in the body'of air, tends to causel the particles of liquid o'r'unvaporized oil to fly outwardly and to be'deposited on the side walls of the tubular casing 9 whence theyrun down into the bottom of the tubular casing and into the. con- The air, together with the portions of the oil` already vaporized, pass to the center of the chamberI 9 and upwardly within the pipes 10 and 12 intol tlie intake connection of the' engine. The4 condition of suction existing in this intake connection of the engine is such that whenA the throttle is nearly closed, for example, in

starting, oil or liquid fuel-'is drawn from the bottom of the chamber 9, through t-he connection 13, into the-portion 14 where itf is subjected to he'at by the action of the exhaust products of combustion passing into exhaust pipe 3, and 'oil is thereby vaporized and vapor is drawn' from such heating portion 1.4 into the intake 2 where it is mixed' with the air and vapor mixture passing up- 10 wardly through the pipes 10 and 12.

Instead of using the exhaust gas for heating the condensed fuel in its passage from the separator 9 to the intake 2 of the engine, any other suitable heating means may be used. Thus, as shown in Fig. 2, the con nection 13 may lead through a pipe 15, heated by a burner 16, the construction being otherwise as above described..

What I claim is:

` l. In combination with an inletmeans for an internal combustion engine and a carbureteifor supplying air and-oil inrdeiinite proportions, of a chamber connected to said .Carbureter and adapted to receive the.oil therefrom and provided with means for collecting condensed oil, a connection from said chamber to the said inlet means for passage of vapor and air to said air inlet means, said connection being provided with a throtv tle and a connection from the lower part of said chamber to said air inlet means' for passage of condensed fuel from said chamber to the said oil inlet 'means and means for supplying heat to said fuel connectio'n.

2. In combination with an inlet means fore an internal combustion engine and a carbureter for supplying air and oil in definite proportions of a chamber connected to said carbureter and adapted to receive the oil therefrom and provided with means for collecting condensed oil, a connection from said chamber to the said inlet means for passage of vapor and `airto said air inlet means, sald connectlon being provided with a throt- -tle and a connection from the lower part of said chamber to-said air inlet means for passage of condensed fuelfrom said chamber to the said air inlet means, said engine having an exhaust connection extending in heat transmitting relation to a part of said fuel connection tosupply heat thereto. v

3. The combination .with inlet means .for an internal'combustion engine, of a carbureter, separating means connected to the carbureter to receive the mixture of oil and `air therefrom and to separate the unvaporized from the vaporized oil, a connection from the said separating means to said inlet means for deliveringl the mixture of air and oil vaporfrom ,the said` separating means to- 1,017, rae

an internal combustion engine, a carbureter, a separating chamber having an mlet connected to said carburetcr, and having an outlet connected to the engine inlet means, al

throttle controlling communication from said outlet to the engine inlet means and separating means extending into' said chamber 'to deflect the mixture passing therethrough to- I ward the bottom of the chamber so 'as to separate the unvaporized oil from the mixture, a fuel connection rleading from the lower part of said fuel collecting chamber to the engine inlet means, and means for heating said fuel connection. f

5. In combination with inlet means for an internal combustion engine, a carbureter, a separating chamber having an inlet con- -nected to said'carbureter, and having anl outlet connected to the engine inlet means,

a throttle controlling communication from said outlet to the engine inlet means and separating means extending into said chamber 'to deflect the mixture passing therethrough toward the bottom of the chamber so as separate the unvaporized oil from themixture, a fuel connection leading from the lower part of said fuel collecting chamber to the engine inlet means, and means for heating said fuel connection, said fuel separat- ,t lng means consisting of a tubular member extending from the outletof said chamber downwardly. and opening into said chamber and said chamber surrounding said tubular member, leaving a space between said t-ubular member and the wall of 4said chamber, and the inlet means for said/chamber opening tangentially through the wall of said chamber to .deliver t-he mixtureinto said space with a whirling motion.

In testimony whereof, I have hereunto set my hand at Los Angeles, California this 17 day'ofFebruary, 1911. Y ALFRED C. STEWART.' In presence off- ARTHUR P. KNIGHT,

F. A. CRANDALL.. 

